list01 = ['a', (1, 2, 3), {'b': 'B', 'c': 'C'}]
list02 = list01
list03 = list01[:]
list02[0] = 'b'
print(list01[0])  # ?   b

list02[2]['b'] = 'BB'
print(list02[2]['b'])  # ?  BB
list03[0] = 'bb'
print(list01[0])  # ?   b
